Comparative assessment of reproductive abilities of crossbred heifers in the conditions of the Lower Volga Region

M. Slozhenkina, A. A. Kaidulina, V. Grishin, E. Karpenko, S. Surkova
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Abstract

Aim. To study in a comparative aspect the reproductive abilities of crossbred heifers obtained as a result of industrial interbreeding. Material and Methods. Zootechnical and mathematical methods of analysis, as well as the documents of zootechnical breeding records available on the farm, cards of breeding bulls-producers were used in the course of research. The digital material was biometrically processed on a PC using the Microsoft Office Excel program. Results. Studies have shown that crossbred young animal of all four experimental groups were characterized by high growth rates and gain in live weight. At the same time, the most weighty and forward were the three-breed hybrid Hereford heifers of the III group with the genotype ½ hereford x ¼ charolais x ¼ simmenthal. However, the rapid gain in body weight did not affect the age of the onset and end of puberty in young animals of this group and amounted to 258.30 and 316.22 days. respectively. In crossbred heifers of Kalmyk breed of group I with a genotype of ½ kalmyks. x ¼ salers x ¼ simmenthal faster than all their peers, puberty began and ended (249.30 and 301.40 days, respectively), which made it possible to start inseminating them first (485.50 days). Conclusion. In crossbred first-calf heifers of all four genotypes, good maternal qualities were noted, which allows them to be used in the formation of broodstock in beef cattle breeding. To increase the production of beef and improve its quality, it is advisable to effectively use the genetic potential of the Kalmyk and Hereford breeds.
伏尔加河下游地区条件下杂交小母牛繁殖能力的比较评价
的目标。从比较的角度研究工业杂交所获得的杂交种的繁殖能力。材料和方法。在研究过程中使用了动物技术和数学分析方法,以及养殖场现有的动物技术育种记录文件和种牛生产者卡片。这些数字材料是在个人电脑上使用微软Office Excel程序进行生物识别处理的。结果。研究表明,四个试验组杂交幼畜的生长速度和活重均较高。同时,最重和最向前的是基因型为1 / 2赫里福德× 1 / 4夏洛莱× 1 / 4西门塔尔的3种杂交赫里福德小母牛III组。然而,体重的快速增加并没有影响该组幼鼠青春期开始和结束的年龄,分别为258.30天和316.22天。分别。卡尔梅克混血小母牛,基因型为1 / 2卡尔梅克。青春期开始和结束的时间(分别为249.30天和301.40天)比所有同龄人都要快,这使得他们有可能首先开始人工授精(485.50天)。结论。在所有四种基因型的杂交小牛中,注意到良好的母系品质,这使得它们可以用于肉牛育种中形成的亲本。为了增加牛肉的产量和提高其质量,建议有效地利用卡尔梅克和赫里福德品种的遗传潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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